// h2 will be always invoked by EventExecutor 'e1'.
ch.pipeline().addLast(e1, h2);
// h3 will be always invoked by EventExecutor 'e2'.
ch.pipeline().addLast(e2, h3);
l.register(ch).sync().channel().connect(localAddr).sync();
// Fire inbound events from all possible starting points.
ch.pipeline().fireChannelRead("1");
ch.pipeline().context(h1).fireChannelRead("2");
ch.pipeline().context(h2).fireChannelRead("3");